diff --git a/extensions/telegram-user/src/monitor/handler.ts b/extensions/telegram-user/src/monitor/handler.ts
index acbb2d7fd..1cffa5a5a 100644
--- a/extensions/telegram-user/src/monitor/handler.ts
+++ b/extensions/telegram-user/src/monitor/handler.ts
@@ -22,6 +22,7 @@ type TelegramUserHandlerParams = {
   runtime: RuntimeEnv;
   accountId: string;
   accountConfig: TelegramUserAccountConfig;
+  abortSignal?: AbortSignal;
   self?: { id: number; username?: string | null };
 };
 
@@ -89,8 +90,10 @@ async function safeSendTyping(params: {
   status: Parameters<TelegramClient["sendTyping"]>[1];
   typingParams?: Parameters<TelegramClient["sendTyping"]>[2];
   runtime: TelegramUserHandlerParams["runtime"];
+  abortSignal?: AbortSignal;
   logLabel: string;
 }) {
+  if (params.abortSignal?.aborted) return;
   if (isClientDestroyed(params.client)) return;
   try {
     await params.client.sendTyping(params.target, params.status, params.typingParams);
@@ -279,7 +282,7 @@ async function resolveMediaAttachments(params: {
 }
 
 export function createTelegramUserMessageHandler(params: TelegramUserHandlerParams) {
-  const { client, cfg, runtime, accountId, accountConfig, self } = params;
+  const { client, cfg, runtime, accountId, accountConfig, self, abortSignal } = params;
   const core = getTelegramUserRuntime();
   const textLimit = accountConfig.textChunkLimit ?? DEFAULT_TEXT_LIMIT;
   const mediaMaxMb = accountConfig.mediaMaxMb ?? DEFAULT_MEDIA_MAX_MB;
@@ -288,6 +291,8 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
   const groupAllowFrom = accountConfig.groupAllowFrom ?? allowFrom;
 
   return async (msg: MessageContext) => {
+    if (abortSignal?.aborted) return;
+    if (isClientDestroyed(client)) return;
     try {
       if (msg.isOutgoing || msg.isService) return;
       const messageGroup = msg.isMessageGroup ? msg.messages : [msg];
@@ -642,10 +647,14 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
             .responsePrefix,
           humanDelay: core.channel.reply.resolveHumanDelayConfig(cfg, route.agentId),
           deliver: async (payload) => {
+            if (abortSignal?.aborted) return;
+            if (isClientDestroyed(client)) return;
             const replyToId = hasReplied ? undefined : msg.id;
             const replyText = payload.text ?? "";
             const mediaUrl = payload.mediaUrl;
             if (mediaUrl) {
+              if (abortSignal?.aborted) return;
+              if (isClientDestroyed(client)) return;
               if (payload.audioAsVoice) {
                 await safeSendTyping({
                   client,
@@ -653,6 +662,7 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
                   status: "record_voice",
                   typingParams,
                   runtime,
+                  abortSignal,
                   logLabel: "voice typing",
                 });
               }
@@ -680,6 +690,8 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
             }
             if (replyText) {
               for (const chunk of core.channel.text.chunkMarkdownText(replyText, textLimit)) {
+                if (abortSignal?.aborted) return;
+                if (isClientDestroyed(client)) return;
                 const trimmed = chunk.trim();
                 if (!trimmed) continue;
                 try {
@@ -709,6 +721,7 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
               status: "typing",
               typingParams,
               runtime,
+              abortSignal,
               logLabel: "typing",
             });
           },
diff --git a/extensions/telegram-user/src/monitor/index.ts b/extensions/telegram-user/src/monitor/index.ts
index 5e7486089..c9742c7dc 100644
--- a/extensions/telegram-user/src/monitor/index.ts
+++ b/extensions/telegram-user/src/monitor/index.ts
@@ -18,6 +18,11 @@ async function loadMtcuteDispatcher(): Promise<MtcuteDispatcher> {
   return mtcuteDispatcherPromise;
 }
 
+function isDestroyedClientError(err: unknown): boolean {
+  const message = err instanceof Error ? err.message : String(err);
+  return /client is destroyed/i.test(message);
+}
+
 export type MonitorTelegramUserOpts = {
   runtime?: RuntimeEnv;
   abortSignal?: AbortSignal;
@@ -33,6 +38,8 @@ export async function monitorTelegramUserProvider(opts: MonitorTelegramUserOpts
   });
   if (!account.enabled) return;
 
+  let shuttingDown = false;
+
   const apiId = account.credentials.apiId;
   const apiHash = account.credentials.apiHash;
   if (!apiId || !apiHash) {
@@ -60,6 +67,7 @@ export async function monitorTelegramUserProvider(opts: MonitorTelegramUserOpts
   setActiveTelegramUserClient(client);
 
   const stop = async () => {
+    shuttingDown = true;
     setActiveTelegramUserClient(null);
     await client.destroy().catch(() => undefined);
   };
@@ -67,6 +75,7 @@ export async function monitorTelegramUserProvider(opts: MonitorTelegramUserOpts
   opts.abortSignal?.addEventListener(
     "abort",
     () => {
+      shuttingDown = true;
       void stop();
     },
     { once: true },
@@ -83,6 +92,7 @@ export async function monitorTelegramUserProvider(opts: MonitorTelegramUserOpts
     runtime,
     accountId: account.accountId,
     accountConfig: account.config,
+    abortSignal: opts.abortSignal,
     self: self
       ? { id: self.id, username: "username" in self ? self.username : undefined }
       : undefined,
@@ -99,15 +109,31 @@ export async function monitorTelegramUserProvider(opts: MonitorTelegramUserOpts
   );
 
   await new Promise<void>((resolve, reject) => {
-    client.onError.add((err) => {
-      runtime.error?.(`telegram-user client error: ${String(err)}`);
+    let settled = false;
+    const settleResolve = () => {
+      if (settled) return;
+      settled = true;
+      resolve();
+    };
+    const settleReject = (err: unknown) => {
+      if (settled) return;
+      settled = true;
       reject(err);
+    };
+
+    client.onError.add((err) => {
+      if (shuttingDown || opts.abortSignal?.aborted || isDestroyedClientError(err)) {
+        settleResolve();
+        return;
+      }
+      runtime.error?.(`telegram-user client error: ${String(err)}`);
+      settleReject(err);
     });
     if (opts.abortSignal?.aborted) {
-      resolve();
+      settleResolve();
       return;
     }
-    opts.abortSignal?.addEventListener("abort", () => resolve(), { once: true });
+    opts.abortSignal?.addEventListener("abort", () => settleResolve(), { once: true });
   });
 
   await stop();